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debris disk

(circumstellar disk of dust and debris around a star)

A debris disk is a circumstellar disk of dust and debris around a fully formed star rather than a protoplanetary disk of gas around a protostar or new star. Debris disks are presumed to exist incorporating debris resulting from planet and planetoid impacts. Observed disks around mature stars may be interpreted as such.


(stars)
http://en.wikipedia.org/wiki/Debris_disk

Referenced by:
circumstellar disk
HR 8799

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